The dam's reservoir has a total storage capacity of approximately 485 million cubic meters of water.
It is situated within the Odemira municipality, an area known for the largest concentration of greenhouse agriculture in Portugal.
The construction of the dam significantly altered the hydrology of the Mira River, creating a vast winding lake with dozens of small inlets.
The water level fluctuations in the reservoir are significant due to seasonal irrigation demands, often exposing large areas of the shoreline.
The site is a major destination for sport fishing enthusiasts targeting invasive predator species that thrive in the reservoir.
The dam's primary purpose was to irrigate the Mira Valley to promote agricultural development in a historically arid region.
Santa Clara Dam, known as Barragem de Santa Clara, is one of the largest reservoirs in Portugal, located on the Mira River in the Alentejo region. The dam is an earth-fill structure reaching a height of 83 meters and a length of 500 meters, completed in 1968. Its reservoir covers approximately 800 hectares, serving as a critical water source for agricultural irrigation in the surrounding municipalities. The surrounding landscape consists of rugged terrain and Mediterranean scrubland, characterized by steep valleys and wooded hills. It is a popular location for freshwater fishing, particularly for black bass and carp. The area offers significant biodiversity and is part of the Natura 2000 network habitat zones. There is no major tourist infrastructure on-site, maintaining a remote and wild environment. The dam plays a vital role in the regional economy by supporting local horticulture and fruit production.
The crest of the dam wall provides the best panoramic vantage point over the full extent of the reservoir.
Bring polarized sunglasses to reduce glare when observing the reservoir water.
Carry plenty of drinking water as there are no facilities or shops immediately at the reservoir edge.
Ensure your vehicle has a full tank of fuel before arriving as the location is isolated from major service stations.
Do not attempt to swim in the reservoir without local knowledge of underwater obstructions and currents.
Practice leave-no-trace principles; respect the private agricultural lands surrounding the perimeter.
